The Tamron SP AF28-75mm f/2.8 XR Di for Nikon is one of the most compact and lightest in the history of fast zoom lenses. Thanks to the downsizing "XR" technology employed by Tamron the dramatic compactness that makes this lens one of the world's smallest and lightest is achieved. Its compactness makes it look and feel like an ordinary standard zoom lens, yet it still obtains the versatility that a fast constant maximum aperture offers.